Toy FPV

Published on May 07, 2013

Toy FPV

The idea and implementation of the system for first-person flights on radio-controlled models are hidden under the cut.



Almost a year has passed since the day when I, having read very interesting articles , decided to build my quadrocopter. Some time was spent on estimating the characteristics, selecting components, finding the perfect balance between quality and price. Then there were months of yearning for parcels from around the world. Designing and manufacturing the frame, assembling a bunch of parts into a single system, soldering, flashing, tuning, checking, the first timid flights in the room, all this lasted until winter and non-flying weather for a beginner. Then it came to understand that the frame should be folding in order to simplify the transportation of the quad to the place of the flies, again design, manufacture, assembly, etc.
Photo handsome
assembled


ready to fly



After repeated flights on a virtual quadrocopter in the simulator, on indoor micro-helicopters and micro-quadrics in the room, piloting skills appeared sufficient to control the “big” quad. At the beginning of the May holidays he opened his first season, flocked enough and almost did not fall. On the next flight day, I wanted more, shoot a video from above. The camera was only on the phone. He was fastened with screeds and scotch tape on board. Everything went well, although the video leaves much to be desired.


The next stage of development is first-person flights (First Person View (FPV) - first-person view). Wait for the parcels with the necessary details for this for more than a month, but I want to try now.
Then an idea came up, the implementation of which I would like to share in this article, and not to brag about my toys, as it might have seemed from a lengthy introduction.

The idea itself

To fly through the camera, the camera itself, a transmitter, a receiver and a monitor are required. This is a necessary minimum. It is also highly advisable to know what is happening with the model in the air. The OSD system (On Screen Display) superimposes overhead information (artificial horizon, compass, direction to take-off location, current coordinates, altitude, speed, battery voltage, current consumption, used battery capacity, flight time, everything you need) directly from the heading camera .
You can see how the FPV flight looks with a minimal set. The camera is in the phone, it also has a Wi-Fi module (will be used to transmit video) and an android with many useful programs. As a monitor on earth, I used a tablet (but a second mobile phone will do) with the same android on board and a Wi-Fi module, of course.

Procedure:

  • on both android devices install the application ( WebOfCam ). It allows you to turn the phone on the copter into a webcam, and the second device into a terminal to view the video stream from this camera in almost real time. Roles are selected the first time the application is launched or in its settings.
  • on one of the devices using the operating system (on cyanogen 2.3.7 Settings => Wireless networks => Modem mode, here the settings for the access point and a checkmark for turning on / off) or using third-party applications (WiFi Tethering, for example) create a Wi-Fi access point , having previously disconnected the mobile Internet.
  • connect from the second device to the created wireless LAN.
  • we launch the application on both devices and see the image from the camera of the first on the screen of the second, which we achieved.

And then everything is simple, take a quad, control equipment, mobile phone, tablet (in my case), blue duct tape, couplers, 1-2 friends to a deserted field suitable for flying and fly through the camera in the first person!

Warnings and Cautions

It is worth noting that takeoff and landing is best done looking at the model, from a third party.
You need to go to the camera gradually, without losing sight of the model, clearly imagining where, in what position and orientation it is.
You also need to remember about the small range of our “field” wireless LAN, do not fly far and high.
The picture comes with a slight delay. You must always be ready to switch to third-party management.
The downside may be one frequency range of Wi-Fi and control equipment (2.4GHz), but I had no problems.

And do not forget, this is not a real FPV , but only a way to see how it looks while you are waiting for a full set!

I hope this information will be useful, I wish you all good luck and soft landings.